Received: 8 May 2019
Accepted: 25 September 2019
First Online: 25 October 2019
Ethics approval and consent to participate
: The study was approved by the medical research ethics committee of the National Institute of Infectious Diseases for the use of human subjects (approval numbers 667 and 964) and was performed in accordance with the ethical standards of the Declaration of Helsinki. Written informed consent from patients or their family members was obtained.
: Written informed consent was obtained from the patients or their family members for publication of de-identified data.
: The authors declare that they have no competing interests.